Align the battery pack’s slide rails with the grooves on the charger. Push the battery firmly downward until it clicks into place. You should feel positive engagement.
A: Bosch has discontinued the KL 1208. A modern universal charger for NiCd 12V batteries (such as the Bosch AL 1115 CV) may work, but verify compatibility. For best results, consider upgrading your tool and battery system to modern 12V Li-Ion platforms.
Pull the battery pack straight up and out of the charger. Disconnect the charger from the wall outlet if not in use. 4. Understanding the LED Indicator Light The single most confusing aspect of the KL 1208 is its LED behavior, because it does not work like modern smart chargers. Here is a diagnostic table based on the original manual:
| LED Status | Meaning | Action Required | |------------|---------|------------------| | No light (unplugged or plugged without battery) | No power or defective charger | Check outlet. Try different outlet. | | No light (battery inserted) | Charge complete OR battery fully dead (zero voltage) | Remove battery. If tool doesn’t run, battery may need replacement. | | Solid green (steady) | Normal charging (timer running) | No action. Wait up to 60 minutes. | | Rapid flashing green (once per second) | Battery temperature too high/low | Remove battery. Let it reach room temperature (1-2 hours). Reinsert. | | Very dim green or intermittent light | Aging electronic components | Charger nearing end of life. Consider replacement. |
A: The green LED will turn OFF. However, because the KL 1208 is a timer charger, the LED turns off when the timer ends, not when the battery is full. If your battery is old, it may be fully charged before the timer ends (causing slight overcharge) or never reach full charge.
A: While Bosch no longer hosts this manual for the KL 1208 (discontinued product), you can find scanned copies on third-party manual sites like ManualsLib, ManualsOnline, or via the Internet Archive. Alternatively, save this article—it contains all the original instructions.
